Display panel and liquid crystal display device

ABSTRACT

The present disclosure provides a display panel and a liquid crystal display device. The display panel includes an array substrate and a flexible thin film. The array substrate has a first surface, a second surface disposed opposite to and in parallel with the first surface, and a first side surface connected to the first surface and the second surface. The first surface of the array substrate is on a same side as a light-emitting surface of the array substrate, and the flexible thin film is disposed on a side of the second surface of the array substrate. The display panel and the liquid crystal display device have narrow frames.

FIELD OF INVENTION

The present disclosure relates to the field of display technologies, andmore particularly, to a display panel and a liquid crystal displaydevice.

BACKGROUND OF INVENTION

At present, electrode lines of liquid crystal display (LCD) devices aredisposed on a glass of a step region of an array substrate by a chip onfilm (COF) bonded to the glass of the step region to make a circuit in adisplay area of a liquid crystal display device electrically connectedto a driver chip (driving integrated circuit). The industries develop anadvanced technique, that is, a side bonding technique. The side bondingtechnique disposes electrode lines on a side surface of an arraysubstrate, which is flush with a side surface of a color filtersubstrate. Since a chip on film cannot be directly connected to asection of in-plane electrode lines of a display area, it needs todispose a layer of side surface electrode lines on a side surface of theglass, and then to bond a chip on film to the side surface electrodelines, thereby achieving electrical connection between a liquid crystalcell circuit and a driver chip. The side bonding technique can reducespaces occupied by an outer lead bonding (OLB) area for bonding a driverchip, so in general, it is suitable for an LCD narrow frame technique.However, a chip on film and a driver chip of the side bonding techniqueare necessary to be disposed on a side surface of a liquid crystaldisplay panel, which occupies spaces on a side of a liquid crystaldisplay panel and is unfavorable for liquid crystal display panels tofurther achieve narrow frames.

An objective of the present disclosure is to provide a display panel anda liquid crystal display device having narrow frames.

SUMMARY OF INVENTION

A display panel comprises an array substrate and a flexible thin film.Wherein the array substrate has a first surface, a second surfacedisposed opposite to and in parallel with the first surface, and a firstside surface connected to the first surface and the second surface;wherein the first surface of the array substrate is on a same side as alight-emitting surface of the array substrate, and the flexible thinfilm is disposed on a side of the second surface of the array substrate.

In the above display panel, the display panel further comprises aplurality of first wires and a plurality of second wires, wherein thefirst wires are disposed on the first surface of the array substrate,the second wires extend from the first side surface of the arraysubstrate to the second surface of the array substrate, and each of thefirst wires is in contact with each of the second wires.

In the above display panel, wherein a width of the first wires isgreater than a width of the second wires.

In the above display panel, the array substrate further comprises aninclined plane, the inclined plane is connected to the first sidesurface of the array substrate and the second surface of the arraysubstrate, the second wires extend from the first side surface of thearray substrate to the inclined plane of the array substrate and extendfrom the inclined plane of the array substrate to the second surface ofthe array substrate.

In the above display panel, the display panel further comprises a colorfilter substrate, wherein the color filter substrate has a second sidesurface corresponding to and flush with the first side surface of thearray substrate, and the second wires extend to the second side surfaceof the color filter substrate.

In the above display panel, the display panel further comprises aprotective layer covering the second wires.

In the above display panel, an outer peripheral edge of the color filtersubstrate is flush with an outer peripheral edge of the array substrate.

In the above display panel, wherein the color filter substrate comprisesa substrate and a first color filter layer disposed in a display area ofthe substrate, the display panel further comprises frame glue disposedbetween the substrate and the array substrate, an outer peripheral edgeof the frame glue is flush with outer peripheral edges of the colorfilter substrate and the array substrate, and the second wires extend toa side surface of the frame glue and extend from the side surface of theframe glue to the second side surface of the color filter substrate.

In the above display panel, wherein the color filter substrate comprisesa substrate, a first color filter layer disposed on the substrate, and asecond color filter layer disposed on the substrate; wherein the secondcolor filter layer is disposed outside the first color filter layer andadjacent to an outer edge of the color filter substrate, and the secondwires extend from the array substrate to a side surface of the secondcolor filter layer and extend from the side surface of the second colorfilter layer to the substrate.

In the above display panel, wherein the second wires are formed byprinting.

In the above display panel, wherein the flexible thin film is a chip onfilm, a driver chip is disposed on the flexible thin film, the displaypanel further comprises a flexible printed circuit board, the flexibleprinted circuit board is connected to the flexible thin film, and thedriver chip is electrically connected to the second wires.

In the above display panel, wherein the flexible thin film is a flexibleprinted circuit board, the display panel further comprises a driver chipelectrically connected to the flexible thin film, the driver chip isbonded to the second surface of the array substrate, and the driver chipis electrically connected to the second wires.

A liquid crystal display device comprises a display panel and abacklight module. The display panel comprises an array substrate and aflexible thin film; wherein the array substrate has a first surface, asecond surface disposed opposite to and in parallel with the firstsurface, and a first side surface connected to the first surface and thesecond surface; wherein the first surface of the array substrate is on asame side as a light-emitting surface of the array substrate, and theflexible thin film is disposed on a side of the second surface of thearray substrate; the backlight module is disposed on a side of theflexible thin film of the array substrate, and the flexible thin film isdisposed between the backlight module and the display panel.

In the above liquid crystal display device, wherein the display panelfurther comprises a plurality of first wires and a plurality of secondwires, the first wires are disposed on the first surface of the arraysubstrate, the second wires extend from the first side surface of thearray substrate to the second surface of the array substrate, and eachof the first wires is in contact with each of the second wires.

In the above liquid crystal display device, wherein a width of the firstwires is greater than a width of the second wires.

In the above liquid crystal display device, wherein the array substratefurther comprises an inclined plane, the inclined plane is connected tothe first side surface of the array substrate and the second surface ofthe array substrate, the second wires extend from the first side surfaceof the array substrate to the inclined plane of the array substrate andextend from the inclined plane of the array substrate to the secondsurface of the array substrate.

In the above liquid crystal display device, wherein the display panelfurther comprises a color filter substrate, the color filter substratehas a second side surface corresponding to and flush with the first sidesurface of the array substrate, and the second wires extend to thesecond side surface of the color filter substrate.

In the above liquid crystal display device, wherein an outer peripheraledge of the color filter substrate is flush with an outer peripheraledge of the array substrate.

In the above liquid crystal display device, wherein the color filtersubstrate comprises a substrate and a first color filter layer disposedin a display area of the substrate, the display panel further comprisesframe glue disposed between the substrate and the array substrate, anouter peripheral edge of the frame glue is flush with outer peripheraledges of the color filter substrate and the array substrate, and thesecond wires extend to a side surface of the frame glue and extend fromthe side surface of the frame glue to the second side surface of thecolor filter substrate.

In the above liquid crystal display device, wherein the color filtersubstrate comprises a substrate, a first color filter layer disposed onthe substrate, and a second color filter layer disposed on thesubstrate; wherein the second color filter layer is disposed outside thefirst color filter layer and adjacent to an outer edge of the colorfilter substrate, and the second wires extend from the array substrateto a side surface of the second color filter layer and extend from theside surface of the second color filter layer to the substrate.

Beneficial effect: the present disclosure provides a display panel and aliquid crystal display device by disposing a flexible thin film on abackside of a light-emitting surface of an array substrate to make thedisplay panel and the liquid crystal display device have narrow frames.

DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic structural diagram of a display panel according tothe first embodiment of the present disclosure.

FIG. 2 is a schematic structural diagram of a display panel according tothe second embodiment of the present disclosure.

FIG. 3 is a schematic structural diagram of a display panel according tothe third embodiment of the present disclosure.

FIG. 4 is a schematic structural diagram of a display panel according tothe fourth embodiment of the present disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The embodiments of the present disclosure are described in detailhereinafter. Examples of the described embodiments are given in theaccompanying drawings. The specific embodiments described with referenceto the attached drawings are all exemplary and are intended toillustrate and interpret the present disclosure. Based on theembodiments in the present disclosure, all other embodiments obtained bythose skilled in the art without creative efforts are within the scopeof the present disclosure.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of adisplay panel according to the first embodiment of the presentdisclosure. Display panels of the present disclosure can belight-emitting diode display panels or liquid crystal display panels.The following uses a liquid crystal display panel to describe technicalsolutions of the present disclosure. A display panel 100 comprises anarray substrate 10, a color filter substrate 11, a frame glue 12, aflexible thin film 13, a plurality of first wires 14, and a plurality ofsecond wires 15.

The array substrate 10 has a first surface 100 a, a second surface 100 bdisposed opposite to and in parallel with the first surface 100 a, and afirst side surface 100 c connected to the first surface 100 a and thesecond surface 100 b. Wherein the first surface 100 a of the arraysubstrate 10 is on a same side as a light-emitting surface of the arraysubstrate 10. The second surface 100 b of the array substrate 10 isdisposed on a backside surface of the light-emitting surface of thearray substrate 10. The first side surface 100 c is perpendicular to thefirst surface 100 a and the second surface 100 b.

A plurality of first wires 14 are data lines on the array substrate 10and peripheral lines electrically connected to a gate driving circuit. Aplurality of the first wires 14 are disposed on the first surface 100 aof the array substrate 10. A thickness of each first wire 14 ranges from2500 Å to 3500 Å, and a width of each first wire 14 ranges from 20 μm to35 μm. The first wires 14 are obtained by forming a first conductivelayer on the first surface 100 a of the array substrate, then coating aphotoresist on the first conductive layer, using a mask to expose thepartial photoresist, using a developer to remove the partialphotoresist, using an etching process to remove the first conductivelayer which is not covered by the photoresist, and removing theremaining photoresist. A preparing material of the first wires 14comprises, but is not limited to, molybdenum, aluminum, titanium, gold,copper, hafnium, tantalum, or alloys thereof.

A plurality of the second wires 15 extend from the first side surface100 c of the array substrate 10 to the second surface 100 b of the arraysubstrate 10. The second wires 15 are formed by printing. Specifically,a plurality of the second wires 15 are formed by transfer printingtechnology or screen-printing technology. The second wires 15 are formedby printing a silver paste on the second surface 100 b of the arraysubstrate 10 and the first side surface 100 c of the array substrate 10,and then evaporating a solvent of the silver paste. The silver pastecomprises nano silver particles and a solvent for the nano silverparticles. That is, the second wires 15 are silver lines.

Each of the first wires 14 is in contact with each of the second wires15. A surface of the second wires 15 is in contact with across-sectional surface in a thickness direction of the first wires 14.A width of the first wires 14 is greater than a width of the secondwires 15 that makes the first wires 14 completely in contact with thesecond wires 15, thereby increasing contact yield of the first wires 14and the second wires 15. It should be understood that the width of thefirst wires 14 can be less than the width of the second wires 15.

The flexible thin film 13 is disposed on a side of the second surface100 b of the array substrate 10. The flexible thin film 13 is a chip onfilm. The chip on film 13 comprises a flexible substrate 131 and adriver chip 132 disposed on the flexible substrate 131. That is, thedriver chip 132 is disposed on the chip on film. The driver chip 132 iselectrically connected to the second wires 15 to make electrical signalsof the driver chip 132 output to the first wires 14 through the secondwires 15, thereby controlling the display panel to display images. Thedisplay panel 100 also comprises a flexible printed circuit board 16.The flexible printed circuit board 16 is connected to the flexible thinfilm 13 to make electrical signals of the flexible printed circuit board16 output to the driver chip 132 of the flexible thin film 13.

The color filter substrate 11 is disposed opposite to the arraysubstrate 10, and the color filter substrate 11 is disposed on a side ofthe first surface 100 a of the array substrate 10. An outer peripheraledge of the color filter substrate 11 is flush with an outer peripheraledge of the array substrate 10. The color filter substrate 11 has asecond side surface 110 a corresponding to and flush with the first sidesurface 100 c of the array substrate 10. Specifically, the color filtersubstrate 11 comprises a substrate 110 and a first color filter layer111 disposed in a display area of the substrate 110. The second sidesurface 110 a of the color filter substrate 11 is a side surface on asame side as the first side surface 100 c of the array substrate 10. Thecolor filter substrate 11 and the array substrate 10 are bonded by theframe glue 12 to form the display panel 100. Specifically, the frameglue 12 is disposed between the substrate 110 and the array substrate10. An outer peripheral edge of the frame glue 12 is flush with outerperipheral edges of the color filter substrate 11 and the arraysubstrate 10. A width of the frame glue 12 ranges from 1000 μm to 2000μm.

The embodiment of the present disclosure makes the display panel have anarrow frame by disposing the flexible thin film on a backside of thelight-emitting surface of the array substrate to make the flexible thinfilm not occupy spaces of side surface of the display panel but occupyspaces of the backside of the light-emitting surface of the displaypanel.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of adisplay panel according to the second embodiment of the presentdisclosure. The display panel 100 shown in FIG. 2 is basically similarto that shown in FIG. 1. The difference is that a plurality of thesecond wires 15 extend to the second side surface 110 a of the colorfilter substrate 11. In the embodiment, a plurality of the second wires15 extend to a side surface of the frame glue 12, and then extend fromthe side surface of the frame glue 12 to the second side surface 110 aof the color filter substrate 11 that makes the second wires 15 noteasily peeled off from the display panel 100. Furthermore, the displaypanel 100 further comprises a protective layer 17. The protective layer17 covers the second wires 15 that prevents the second wires 15 to bedamaged. The protective layer 17 is disposed on surfaces of the secondwires 15, the first side surface 100 c of the array substrate 10,partial region (the region disposing the second wires 15) of the secondsurface 100 b of the array substrate 10, and the second side surface 110a of the color filter substrate 11. The protective layer 17 can beformed by coating. A preparing material of the protective layer 17 is anorganic insulation material or an inorganic insulation material.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of adisplay panel according to the third embodiment of the presentdisclosure. The display panel shown in FIG. 3 is basically similar tothat shown in FIG. 2. The difference is that the color filter substrate11 comprises a substrate 110, a first color filter layer 111 disposed onthe substrate 110, and a second color filter layer 112 disposed on thesubstrate 110; wherein the second color filter layer 112 is disposedoutside the first color filter layer 111 and adjacent to an outer edgeof the color filter substrate 11. The second color filter layer 112 hasa width ranging from 45 μm to 55 μm. A thickness of the second colorfilter layer 112 is greater than a thickness of the first color filterlayer 111. The first color filter layer 111 and the second color filterlayer 112 can be formed by a same process, or can be formed by twoprocesses. After the color filter substrate 11 and the array substrate10 are bonded by the frame glue 12, the frame glue 12 is disposedbetween the substrate 110 and the array substrate 10. The second colorfilter layer 112 is disposed on one side of the frame glue 12 which isadjacent to the outer peripheral edge of the color filter substrate 11.A distance between the frame glue 12 and the outer peripheral edge ofthe color filter substrate 11 and the array substrate 10 ranges from 100μm to 200 μm. A thickness of the second color filter layer 112 is lessthan or equal to a thickness of the frame glue 12. A plurality of thesecond wires 15 extend from the array substrate 10 to a side surface ofthe second color filter layer 112 and extend from the side surface ofthe second color filter layer 112 to the substrate 110. The second sidesurface 110 a comprises a side surface of the second color filter layer112 which is corresponding to and flush with the array substrate 10 anda side surface of the substrate 110 which is corresponding to and flushwith the array substrate 10.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of adisplay panel according to the fourth embodiment of the presentdisclosure. The display panel 100 shown in FIG. 4 is similar to thatshown in FIG. 2. The difference is that the array substrate 10 furthercomprises an inclined plane 100 d, the inclined plane 100 d is connectedto the first side surface 100 c of the array substrate 10 and the secondsurface 100 b of the array substrate 10, the second wires 15 extend fromthe first side surface 100 c of the array substrate 10 to the inclinedplane 100 d of the array substrate 10 and extend from the inclined plane100 d of the array substrate 10 to the second surface 100 b of the arraysubstrate 10. Before extending from the first side surface 100 c to thesecond surface 100 b, the second wires 15 extend to the inclined plane100 d first, then extending from the inclined plane 100 d to the secondsurface 100 b to reduce the risk of breakage of the second wires 15,thereby preventing interruption of electrical signals transmitted by thesecond wires, which causes the display panel to display abnormally. Theinclined plane 100 d is formed by grinding a right angle between thefirst side surface 100 c and the second surface 100 b of the arraysubstrate 10. A first angle between the inclined plane 100 d and thefirst side surface 100 c is greater than 90 degrees and less than 180degrees, A second angle between the inclined plane 100 d and the secondsurface 100 b is greater than 90 degrees and less than 180 degrees, andthe sum of the first angle and the second angle is 270 degrees. Thefirst angle can be equal to the second angle. For example, both thefirst angle and the second angle are 135 degrees. The first angle can benot equal to the second angle. In addition, the flexible thin film 13 isa flexible printed circuit board, the display panel 100 furthercomprises a driver chip 132 electrically connected to the flexible thinfilm 13, the driver chip 132 and the flexible thin film 13 are bonded tothe second surface 100 b of the array substrate 10. The driver chip 132is electrically connected to the second wires 15 that makes electricalsignals of the driver chip 132 output to the first wires 14 through thesecond wires 15, thereby controlling displays of the display panel.

The present disclosure further provides a liquid crystal display device.The liquid crystal display device comprises the above display panel anda backlight module. The backlight module is disposed on a side of theflexible thin film of the array substrate. That is, the flexible thinfilm is disposed between the array substrate and the backlight module totake full advantage of the spaces between the backlight module and thedisplay panel.

The liquid crystal display device in the embodiment of the presentdisclosure makes the liquid crystal display device have a narrow frameby disposing the flexible thin film on a backside of the light-emittingsurface of the array substrate to make the flexible thin film not occupyspaces of side surface of the display panel, and makes the flexible thinfilm disposed between the backlight module and the display panel to takefull advantage of the spaces between the backlight module and thedisplay panel, thereby making the liquid crystal display device have anarrow frame.

The description of the above embodiments is only for helping tounderstand the technical solution of the present disclosure and its coreideas, and it is understood that many changes and modifications to thedescribed embodiment can be carried out without departing from the scopeand the spirit of the disclosure that is intended to be limited only bythe appended claims.

What is claimed is:
 1. A display panel, comprising an array substrate, aflexible thin film, a color filter substrate, frame glue, a plurality offirst wires, and a plurality of second wires, wherein the arraysubstrate has a first surface, a second surface disposed opposite to andin parallel with the first surface, and a first side surface connectedto the first surface and the second surface; wherein the first surfaceof the array substrate is on a same side as a light-emitting surface ofthe array substrate, and the flexible thin film is totally disposed on aside of the second surface of the array substrate; wherein the firstwires are disposed on the first surface of the array substrate, thesecond wires extend from the first side surface of the array substrateto the second surface of the array substrate, and a surface of thesecond wires is in contact with a cross-sectional surface of the firstwires in a thickness direction; and wherein the color filter substratehas a second side surface corresponding to and flush with the first sidesurface of the array substrate, the frame glue is disposed between thecolor filter substrate and the array substrate, an outer peripheral edgeof the frame glue is flush with outer peripheral edges of the colorfilter substrate and the array substrate, and the second wires extend toa side surface of the frame glue and extend from the side surface of theframe glue to the second side surface of the color filter substrate. 2.The display panel according to claim 1, wherein each of the first wiresis in contact with each of the second wires.
 3. The display panelaccording to claim 1, wherein the array substrate comprises an inclinedplane, the inclined plane is connected to the first side surface of thearray substrate and the second surface of the array substrate, thesecond wires extend from the first side surface of the array substrateto the inclined plane of the array substrate and extend from theinclined plane of the array substrate to the second surface of the arraysubstrate.
 4. The display panel according to claim 1, comprising aprotective layer covering the second wires.
 5. The display panelaccording to claim 1, wherein the color filter substrate comprises asubstrate and a first color filter layer disposed in a display area ofthe substrate, and the frame glue is disposed between the substrate andthe array substrate.
 6. The display panel according to claim 1, whereinthe color filter substrate comprises a substrate, a first color filterlayer disposed on the substrate, and a second color filter layerdisposed on the substrate; wherein the second color filter layer isdisposed outside the first color filter layer and adjacent to an outeredge of the color filter substrate, and the second wires extend from thearray substrate to a side surface of the second color filter layer andextend from the side surface of the second color filter layer to thesubstrate.
 7. The display panel according to claim 1, wherein the secondwires are silver lines printed on the second surface and the first sidesurface of the array substrate.
 8. The display panel according to claim1, wherein the flexible thin film is a chip on film, a driver chip isdisposed on the flexible thin film, the display panel comprises aflexible printed circuit board, the flexible printed circuit board isconnected to the flexible thin film, and the driver chip is electricallyconnected to the second wires.
 9. The display panel according to claim1, wherein the flexible thin film is a flexible printed circuit board,the display panel comprises a driver chip electrically connected to theflexible thin film, the driver chip is bonded to the second surface ofthe array substrate, and the driver chip is electrically connected tothe second wires.
 10. A liquid crystal display device, comprising adisplay panel, wherein the display panel comprises an array substrate, aflexible thin film, a color filter substrate, frame glue, a plurality offirst wires, and a plurality of second wires; wherein the arraysubstrate has a first surface, a second surface disposed opposite to andin parallel with the first surface, and a first side surface connectedto the first surface and the second surface; wherein the first surfaceof the array substrate is on a same side as a light-emitting surface ofthe array substrate, and the flexible thin film is totally disposed on aside of the second surface of the array substrate; wherein the firstwires are disposed on the first surface of the array substrate, thesecond wires extend from the first side surface of the array substrateto the second surface of the array substrate, and a surface of thesecond wires is in contact with a cross-sectional surface of the firstwires in a thickness direction; and wherein the color filter substratehas a second side surface corresponding to and flush with the first sidesurface of the array substrate, the frame glue is disposed between thecolor filter substrate and the array substrate, an outer peripheral edgeof the frame glue is flush with outer peripheral edges of the colorfilter substrate and the array substrate, and the second wires extend toa side surface of the frame glue and extend from the side surface of theframe glue to the second side surface of the color filter substrate. 11.The liquid crystal display device according to claim 10, wherein each ofthe first wires is in contact with each of the second wires.
 12. Theliquid crystal display device according to claim 10, wherein the arraysubstrate comprises an inclined plane, the inclined plane is connectedto the first side surface of the array substrate and the second surfaceof the array substrate, the second wires extend from the first sidesurface of the array substrate to the inclined plane of the arraysubstrate and extend from the inclined plane of the array substrate tothe second surface of the array substrate.
 13. The liquid crystaldisplay device according to claim 10, wherein the color filter substratecomprises a substrate and a first color filter layer disposed in adisplay area of the substrate, and the frame glue is disposed betweenthe substrate and the array substrate.
 14. The liquid crystal displaydevice according to claim 10, wherein the color filter substratecomprises a substrate, a first color filter layer disposed on thesubstrate, and a second color filter layer disposed on the substrate;wherein the second color filter layer is disposed outside the firstcolor filter layer and adjacent to an outer edge of the color filtersubstrate, and the second wires extend from the array substrate to aside surface of the second color filter layer and extend from the sidesurface of the second color filter layer to the substrate.